For anyone interested, I felt like getting out of the apartment last night and went to see Ghost Town. Julia's part was within the first five minutes or so and was totally a "blink and miss her" type thing, especially if you didn't know to look for her.

She was the second person to walk through Greg Kinnear once he died. The running thing was that if you walked through one of the ghosts, you sneezed. (Hence Julia's "Sneezy Lady" part.) When the first guy walked through and sneezed, Julia wasn't far behind. I literally can't tell you anything about her except that her hair was down and her sneeze happened once she was off-screen - she was on screen for a finger snap of time.

I did end up enjoying the movie and thinking it was cute. If nothing else, it's totally worth seeing for the comic genius of Kristen Wiig as the doctor.